Valve



FIG. 1 is a top plan view of an ultra-high purity valve showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a right side elevational view thereof with a portion shown in section, and

FIG. 6 is a left side elevational view thereof. 

The ornamental design for an valve, as shown and described. 